package com.google.code.mochaccino.framework.crypto.hash;

/*
 * Copyright 2012 Claude Houle claude.houle@gmail.com
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;

/**
 * The Hash construct is used to easily hash the data
 * supplied by the application.
 */
public final class Hash {

	private HashAlgo algo;
	private int      iteration;
	private byte[]   salt;

	/** Constructor */
	public Hash( HashAlgo algo, int iteration, byte[] salt ) {
		this.algo = algo;
		this.iteration = iteration;
		this.salt = Arrays.copyOf( salt, salt.length );
	}

	/** Constructor */
	public Hash( HashAlgo algo ) {
		this.algo = algo;
		this.iteration = 0;
		this.salt = null;
	}

	/** Hash */
	public String hash( byte[] data ) throws IOException {
		return algo.hash( data, salt, iteration );
	}

	/** Hash */
	public String hash( String data ) throws IOException {
		return algo.hash( data, salt, iteration );
	}

	/** Hash */
	public String hash( InputStream data ) throws IOException {
		return algo.hash( data, salt, iteration );
	}
}
